Pneumatic cleaning apparatus



Aug. 13, 1929. R. P. swr-:ENY

PNEUMATIC CLEANING APPARATUS Filed NOV. 14, 1924 2. Sheets-Sheet Aug. 13, 1929. R. P. swEENY PNEUMATIC CLEANING APPARATUS Filed Nov. 14l 1924 2 Sheets-Sheet 2 Patented Ang. i3

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iight?? BIEUMTC CLEANING AEPARATUS.

Application filed November 14,1924. Serial No. 749,987..

rThis invention relates to that class of pneumatic cleaning a paratus shown in my application 568830 led J une 1G, 1922, though obviously it could be used for other purposes.

The principal object oi the presentinvention is to improve what 1 denominate the induction chamber or" the device, whereby the lluid under pressure exerts maximum eliect in drawing in the air through the cleaning nozzle.

Another feature of the invention is t-he improved means provided for adjusting the nozzle in the induction chamber to get the maximum benefit of the iiuid under pressure while the cleaning apparatus is in operation.

.another feature of the invention resides in the provision of means'tor a stream line motion in the fluid under pressure at the end of the nozzle of the cleaning pipe.

Other features of the invention relate to the ease of adjustment oi the nozzle in theV induction chamber and the centering of the same as it is moved iny and out.

With these and other object-s in view which will be apparent as the description proceeds, l will now describe my invention in conne@ tion with .the accompanying drawings in which:

Fig'. 1 is a view 4showing the device as ap` plied to a pneumatic cleaner, the device being in side elevation.

F ig. 2 is a vertical median section showing the construction ot the device with the Venturi-tube closed.

F ig. 3 is a view similar to Fig. 2 with the Venturietube opened.

F ig. a is a side elevation of the sliding jet tube.

Fig. 5 is a section on the line 5,-5 of Fig. 2.

4ig. 6 is a section on the line 66 of Fig. 2

Fig. 7 is a section showing the construction ot the suction nozzle with its reverse curves. The apparatus comprises a tube 1 which may be connected to a suction nozzle as, for instance, the one shown in ,the atoremen tioned application, This tub-e 1 terminates just outside of my induction chamber and there is attached to it in any convenient lmanner at 2, a nozzle 3. |This nozzle is preferably ot a uniform exterior diameter through most of its length and cone-shaped at its end as shown in Figs. 2 and 3.

lli/ry induction chamber comprises an outer shell 4i with an inlet 5 thereto on the end of which may be attached a pipe connected with the pump or compressed air supply such as is .also illustrated in my aforementioned application.

The interior of the shell lli provide with ribs 6, so shaped passes through the compressed air pipe 5, keep the currents of compressed air from ruiming together at the top and causing eddies, lthe ribs 6 being shaped on stream lin-es as shown best in Figure 5 and directs the compressed fluid to flow through the right-hand side of' the shell, Figs. 3 and il, at all points around the end of nozzle 3, in an unbroken stream thereby eliminating eddy currents and greatly increasing the efficiency of the apparatus. Those ribs also serve the function of' centeringthe nozzle 3 and guiding it in and out of the shell as shown in Fig. 5. 0n one side of the shell 4l there is preferably formed a flange 7 and a packingv chamber 8 to hold a packing to prevent leakage between the nozzle 3 and the shell or chamber d.

Attached to the flange 7 as byscrews 9 is a ll preferably screw-threaded sleeve 10, which may be 'exthat as the air i tended into' the packing box 8` to preserve y the right pressure on the packing therein.

Embracing the threaded portion of the sleeve 10 is a second sleeve12 screw-threaded to co-act with the sleeve 10 at one end and at the yother end provided with an encircling iianged ring 14. .The nozzle 3 may conven iently be provided with a flange 1,5 having notches therein, not shown, through which projections on the inner periphery of ring 14 may pass as in an ordinary bayonet jointconstruction, in assembling the ring 1li-back of the flange 15 iitting between tl e ring 1% and a flange 16 on the'sleeve 12. Holes 18 may be convenientlv'dri-lled through the embracing portions of the sleeves 12 and 14: which serve as sockets for the insertion ot a pin to screw up or unscrew the sleeve 12 on the sleeve 10.

It will be apparent that as the sleeve 12 and ring 11i move in or out it will carry with it'the nozzle 3 to coact near its end with a bushing 19 shown in detail in Fig. 'Z' and the relative positions ot the end of nozzle 3 and the interior of the bushing 19 are shown in Figs. 2 and 3. The interior surface of this bushing 19 it will be seen is on reversed curved lines at its end adjacent the end or' the nozzle 3 which guides the inrushing fluid on stream lines up to the nozzle 3 and due toits shape, it admit-s a large quantity of the fluid under y of my invention pressure up to this point to get the maximum benefit in drawing fluid through the nozzle 3.

By reversing the motion of the sleeve l2 and ring 14, the nozzle 3 can be moved to the position shown in Fig. 3 and it is apparent that the nozzle 3 may be adjusted at just tiet position where it co-acts with the interior surface of the bushing 19 to get the best effect from the compressed air rushing through the induction chamber. The ribs 6 also act to deliver the inrushing air in the proper direction to get the maximum effect with the power employed.

On the opposite side Vof the induction chamber from the sleeves lO and l2, I may attach a flaring nozzle 21 similar to the nozzle shown in my aforementioned application which may lead the dust-laden fluid to thedust chamberl 22 similar to the one shown in said aforementioned application.

lt is apparent that various modifications may be made without departing from the spirit thereof and l do not wish to be limited to the exact construction shown except as lherein indicated in the following claims.

What I claim is:

l. An induction chamber comprising a curved shell, a nozzle adjustable to and fro in the chamber, said chamber having a compressed air inlet and an outlet surrounding one end of the nozzle, the portion of the chamber surrounding the end of the nozzle having reverse curves which coact with the curved shellto direct the air in' stream lines forward of the nozzle into the outl-et end, and means for adjust-ing the nozzle towards and away from said reverse curved portion.

2. An induction chamber comprising a shell having an air inlet and outlet, a nozzle therein, terminating within the outlet there being a space bounded by reversed curved surfaces between the nozzle and outlet, ribs on the interior of the .shell for conducting the inrushing air on stream lines in front of the ends of the nozzle.

3. An induction chamber comprising a shell having an air inlet and outlet, a nozzle therein, terminating Within the outlet there being a space bounded by reversed curved surfaces between thenozzle and outlet, ribs on the interior of the shell forconducting the inrushing air on stream lines in front of the ends of the nozzle, and means for adjusting the nozzle to and fro between the ribs in the shell.

4. An inductionV chamber comprising a shell having an air inlet and outlet, a nozzle therein, terminating within the outlet there being a .space bounded by reversed curved surfaces between the nozzle and outlet, ribs on the interior of the shell for supporting and centering the nozzle and conducting the inrushing air on stream lines in front of the ends of the nozzle, and means for adjusting the nozzle to and fro in the shell. A

5. An induction chamber comprising a shell having an inlet and outlet, a nozzle in vthe shell, ribs on the interior of the shell adapted to guide the nozzle in its movements in or out of the shell and additionally to direct the inrushing air through the shell in stream lines forward of the nozzle, said shell having a portion near the end of the nozzle with reverse curves therein for cooperation with the ribs in directing' the inrushiug air on proper lines forward of the nozzle end.

6. An induction chamber comprising a shell, a nozzle therein, and means for 'moving the nozzle inwardly and outwardly in the shell, said means comprising a screwthreaded sleeve on the nozzle, a second screw threaded sleeve, and means on the nozzle cooperating with the second sleeve whereby when th-e second sleeve is rotated the nozzle will be moved inwardly or outwardly of the shell. y

7. An induction chamber comprising a shell, a nozzle adjustable therein, a packing gland between the shell and nozzle, an externally .screw-threaded sleeve adjustable towards and from the packing gland, and means cooperative with said screw threaded sleeve for moving` the nozzle to and fro in the shell.

8. An induction chamber comprising a shell, a nozzle adjustable in the shell, a sleeve attached to the shell and-externally screwthreaded, an internally screw-threaded sleeve cooperating with the external screw-threaded sleeve, a ring embracing and extending down over the end of the internally .screw-threaded sleeve and having holes therethrough to act as sockets for facilitating the turning of the internally threaded sleeve to adjust it backwardly and forwardly relative to t-he shell, and means on the nozzle cooperative i Y.ith Vthe internally `threaded sleeve and ring whereby when they are adjusted backwardly and forwardly relative to the shell, the nozzle will be adjusted backward and forwardly in the shell.

9. An induction chamber comprising a curved shell having an inletqand outlet, a nozzle normally passing through the curved shell, the inner surface of the chamber surrounding the endof the nozzle having reverse curves which coact with the outer surface ofthe nozzle to direct the incoming and outgoing fluids in stream lines forward of the nozzle end.

In testimony whereof I hereunto aflix my signature.

ROBERT' P. SWEENY. 

